The sisters posted hilarious tributes to the Selfish author on their respective apps in honor of the milestone on Friday, October 21. Khloé, 32, posted a video of her head Photoshopped onto Kim's body in pictures from several of her past red carpet appearances.

Kylie, meanwhile, showed how she and the birthday girl dress alike by comparing throwback pics. She teased that they both love wearing a corset with just a T-shirt and are "good at wearing coats over jumpsuits with sunglasses." She also sarcastically stated that they "prefer conservative swimsuits."

A post shared by Kim Kardashian West (@kimkardashian) on Mar 7, 2016 at 12:07am PST

Both siblings also teased Kim about her nude pics, posting the revealing bathroom selfie that Kim shared via Instagram in March. "We really, really don't like looking in the mirror," Kylie joked about the naked snapshot.

As previously reported, Kim received both praise and criticism for sharing the provocative shot. She defended herself on her blog amid the controversy.

"I am empowered by my body. I am empowered by my sexuality. I am empowered by feeling comfortable in my skin. I am empowered by showing the world my flaws and not being afraid of what anyone is going to say about me. And I hope that through this platform I have been given, I can encourage the same empowerment for girls and women all over the world," she wrote at the time. "It's 2016. The body-shaming and slut-shaming—it's like, enough is enough. I will not live my life dictated by the issues you have with my sexuality. You be you and let me be me."

Kim hasn't been as vocal on social media as of late. As previously reported, she took a step back following her scary Paris robbery.